When I was about 14, I went over to my Jewish friend Ian's house in December. To my surprise, his family had a tree and it was decorated with lights, tinsel, candy canes, blue/white candy canes and Jewish themed ornaments. They did the Hanukkah thing as well as Christmas. I later found that a few other Jewish friends did as well.

It was a shock at first, but then I realized that my family celebrated Christmas and my dad was a devout atheist and my mom was a Catholic by name only. There wasn't one crucifix or religious themed item in our house. On the tree, the only remotely "religious" thing we had were these ceramic camel ornaments that represented the three wise men...and they were passed down a generation. I don't think I had one single "Christian" friend who went to church ever or celebrated Christ on Christmas.